Evolution of tree stem taper in Pinus taeda stands
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701185 |
Resumo: | ABSTRACT: This study aimed to evaluate the evolution of stem taper of trees in Pinus taedastands using stem analysis data from 126 and 120 trees sampled from established stands in Paraná and Santa Catarina States, respectively. The integer and fractional power polynomial was fitted to estimate diameters inside bark along the stem and was used to construct taper curves by age class. The model identity test was applied to verify the change in stem form of trees. The evolution of natural and artificial form factors in the trees was also analyzed. The curves constructed from the fitted taper functions and form factors showed that the stems become more cylindrical with increasing age; the identity test indicated that, in general, the taper curves statistically differ between themselves. This showed that stratifying the data into age classes for fitting in taper functions can produce more accurate assortment estimates. |
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Ciência rural (Online) |
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Evolution of tree stem taper in Pinus taeda standsstem analysisform factortaperingABSTRACT: This study aimed to evaluate the evolution of stem taper of trees in Pinus taedastands using stem analysis data from 126 and 120 trees sampled from established stands in Paraná and Santa Catarina States, respectively. The integer and fractional power polynomial was fitted to estimate diameters inside bark along the stem and was used to construct taper curves by age class. The model identity test was applied to verify the change in stem form of trees. The evolution of natural and artificial form factors in the trees was also analyzed. The curves constructed from the fitted taper functions and form factors showed that the stems become more cylindrical with increasing age; the identity test indicated that, in general, the taper curves statistically differ between themselves. This showed that stratifying the data into age classes for fitting in taper functions can produce more accurate assortment estimates.Universidade Federal de Santa Maria2016-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701185Ciência Rural v.46 n.7 2016reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20140021info:eu-repo/semantics/openAccessKohler,Sintia ValerioKoehler,Henrique SoaresFigueiredo Filho,AfonsoArce,Julio EduardoMachado,Sebastião do Amaraleng2016-05-03T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Evolution of tree stem taper in Pinus taeda stands |
title |
Evolution of tree stem taper in Pinus taeda stands |
spellingShingle |
Evolution of tree stem taper in Pinus taeda stands Kohler,Sintia Valerio stem analysis form factor tapering |
title_short |
Evolution of tree stem taper in Pinus taeda stands |
title_full |
Evolution of tree stem taper in Pinus taeda stands |
title_fullStr |
Evolution of tree stem taper in Pinus taeda stands |
title_full_unstemmed |
Evolution of tree stem taper in Pinus taeda stands |
title_sort |
Evolution of tree stem taper in Pinus taeda stands |
author |
Kohler,Sintia Valerio |
author_facet |
Kohler,Sintia Valerio Koehler,Henrique Soares Figueiredo Filho,Afonso Arce,Julio Eduardo Machado,Sebastião do Amaral |
author_role |
author |
author2 |
Koehler,Henrique Soares Figueiredo Filho,Afonso Arce,Julio Eduardo Machado,Sebastião do Amaral |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Kohler,Sintia Valerio Koehler,Henrique Soares Figueiredo Filho,Afonso Arce,Julio Eduardo Machado,Sebastião do Amaral |
dc.subject.por.fl_str_mv |
stem analysis form factor tapering |
topic |
stem analysis form factor tapering |
description |
ABSTRACT: This study aimed to evaluate the evolution of stem taper of trees in Pinus taedastands using stem analysis data from 126 and 120 trees sampled from established stands in Paraná and Santa Catarina States, respectively. The integer and fractional power polynomial was fitted to estimate diameters inside bark along the stem and was used to construct taper curves by age class. The model identity test was applied to verify the change in stem form of trees. The evolution of natural and artificial form factors in the trees was also analyzed. The curves constructed from the fitted taper functions and form factors showed that the stems become more cylindrical with increasing age; the identity test indicated that, in general, the taper curves statistically differ between themselves. This showed that stratifying the data into age classes for fitting in taper functions can produce more accurate assortment estimates. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-07-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701185 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701185 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20140021 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Rural v.46 n.7 2016 reponame:Ciência Rural instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Rural |
collection |
Ciência Rural |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1749140549390041088 |